Telephonic apparatus.



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G. L. ANDERS. v

TELEFHONIC APPARATUS.

(Application med may 12, 1899.) (No Model.) 5 Shaets-$het 2 Nn. 635,008. Patented Dot'. I7, |899. G. L. ANDERS.

TELEPHONIG APPARATUS.

(Application led. May 12, 1899.)

(No Model.)

5 sheets-snee: a,

No. 635,008. Patented oct. I7, |899.v

I G. L. ANDERS.

TELEPHONIE APPARATUS.

(Application led May 12, 1899.) (No Model.) SSheetS-Sheet 4.

Wbnsses. ,L1/enf@ W' f7/4MM.

No. 635,008. Patented Oct. I7, |899.

G. L. ANDERS.

TELEPHONIC APPARATUS.

(Application led May 12, 1899.) @l0 MOBL) 5 Sheets-Sheet 5 UrrED STATES y iPATENT EErcE.

GEORGE LEE ANDERS, OF LONDON, ENGLAND.

TELEPHOIC APPARATUS.

SPECIFICATION forming part of Letters :Patent NO. 685,008dated October 17, 1899. Ap'p1ia-a0nieaMay12,1899. serial 1ro. 716,511. (roman.)

T0 all whom t may concern: j

Beit known that I, GEORGE LEE ANDERS, electrical engineer, a subject of the Queen of Great Britain, residing at 35 Valbrook, in the city of London, England, have invented a new and useful Improvement in Telephonie Apparatus, (application for patent filed in Great Britain, No. 20,972, on October 5, 1898,) of which the following is a specification.

My invention relates to telephonie appaV ratus 5 and it consists in a very neat and simple construction of apparatus which is intended for use in place of the ordinary push commonly employed with electric bells.

The apparatus consists of two parts-one the transmitter, which is in general secured to the wall or otherwise fixed, and the other part being a receiver, which is adapted to be applied to the transmitter or base, and the front of Which is arranged like an ordinary push-button.

The features of novelty in my invention reside in the particular arrangement of the parts by which compactness and simplicity are insured and the liability of the same to get out of adjustment avoided. The microphone and receiver are so constructed as tobelcomf plete in themselves and can therefore be put into or taken out of any desired easing without reference to the design of such casing, all the necessary electrical parts being provided on the microphone or receiver and not connected independently to the casings, as has heretofore been the general practice. Further advantages arise from the fact that receivers and transmitters constructed in my improved manner may be supplied of a single pattern or type which can nevertheless be applied to any desired forms of casing without electrical adjustment being necessary.

In the accompanying drawings I show apparatus constructed according to my iuvention.

Figure1 is a front elevation of an entire apparatus, and Fig. 2 is a side elevation of the same. Fig. 3 is a front elevation of the transmitter and its casing. Fig. et is a rear elevation ofthe receiver. Fig. 5 is a rear elevation of the receiver with portions of the outer casing and diaphragm removed so as to show more clearly the magnet and parts secured thereto. Fig. 6 is a section on the j jects.

carbon granules 33h.

line VI VI, Fig. 4t. Fig. 7 is a side elevation, partly sectional, of the receiver-magnet and parts secured thereto. Fig. 8 is a rear elevation, and Fig. 9 a plan, partly sectional, of a transmitter when removed from its supporting-base. Fig. 10 is a section on the line X X, Fig. 3. Fig. 11 is a front elevation of the transmitter with the diaphragm removed. Fig. 12 is adiagram showing the connections to one instrument with the line bell-battery and return or earth. Fig. 13is a rear elevation, partly sectional, of another form of receiver. Fig. 14 is a vertical central section of the same. Fig. 15 is a side elevation of the receiver-magnet and parts secured thereto. Fig. 16 is a diagram similar to Fig. 10, illustrating connections of the second form oi' transmitter.

Referring now more particularly to Figs. 1 to 11, 1 is the casing of the transmitter, which is secured to the wall or the like by means of screws passing through suitable holes in the usual manner. Said casin g is provided with openings2 at the sides for a purpose hereinafter mentioned. The receiver-casing is indicated at 3 and may be made of insulating material, such aseb'onite, suitable for the purpose. Said casing is of a shape similar to that of the central portion of an ordinary elec tric bell-push, being provided with a central orifice a, through which a push-piece 5 pro- An oriiice is also provided at the side of said casing, through which the leads 6, connecting the receiver with the transmitter, are passed. At the backthe receiver-casing is closed by the receiver-diaphragm 7 with protecting'cover 8, the whole being secured by means of 'a metal ring 9, which is screwed upon the receiver-casing. The transmitter proper is shown in Figs. 8 to 1l and consists of a disk of insulation 10, the central portion of whichl is cut away in order to receive the case 11 of a microphone containing the usual Said case 11 is of metal and carries a carbon rod 33a, passing through the carbon granules. The front of the case is provided with an insulating rim or covering 11a, the outer surface of which is Hush with the front face of the ring or disk 10 and is closed by the microphone diaphragm 12, which is partially covered by a ring 13 of insulating material. The main portions of the IOO lhereinabove mentioned has secured to it at the back a metallic spring 17, which projects through a suitable slot in the piece and is adapted normally to engage with the edge of the diaphragm 12,' (see Figs. 9 and 10,) portions of theinsulation-pieces 10 and 13 being cut away for this purpose. The diaphragm is thereby normally connected to the screw 18. When, however, the receiver is placed between the supporting-clips 14 15, as shown in Figs. 1 and 2, the rim 9 thereof presses the spring 17 away from the edge of the diaphragm 12, and thereby breaks the connection between the diaphragm and the screw 18 and connects the latter with the ring 9 of the receiver. This ring is permanently connected through a tongue 19, forming one terminal of the ringing-key, as hereinafter described.

The receiver-magnet, as will be seen from Figs. 5, 6, and 7, is a ring-magnet 20, such as is commonly employed in watch-receivers,and secured to it are two terminals, one ot' which, 21, is in electrical connection with a strip 22, which normally makes contact with the movable portion 23 of the ringing-key, the other end of said movable portion being secured by a screw 2,4 to the magnet2() and to the tongue 19. It will be seen, further, that normally the ring 9 is connected through the tongue 19, the screw 24, key 23, and strip 22 to the terminal 21. Said terminal and the strip 22 are insulated from the magnet 2O in the usual manner. The other terminal 25 is also secured to but insulated from the magnet 20 in a similar fashion to the terminal 21 and is in permanent electrical connection with a strip 26, with which the key 23 connects when the push-button 5 is pressed inward. Said terminal 25 is joined to one end ofthe coil27 of the receiver-magnet, the other end of said coil being joined by a wire 28, which is preferably included with the wires 29 and 30,`passing to the terminals 21 and 25, respectively, in a flexible cord b. It will be seen, therefore, that the magnet 2O has secured to it all the operative parts of the receiver and also the connected through the wire 30 in the exible lead 6 to the insulated terminal 25 of the receiver. The screw 33 on the transmitter is screwed into the case 11 o the microphone and is connected through the wire 28 with the other end of the receiver-coil. The bell 34 is connected between earth or the return-wire and the screw 35 on the transmitter, which screw is connected through the wire 29 with the terminal 21 on the receiver. The line is connected to the screw 18 ou the transmitter,

v which, as before mentioned, is inconnection with the clip l5 and the spring-contact 17.

The various screws 18 32 35 are screwed through the insulation-disk 10 into pieces of metal 18 32a 35, which are independently secured to the disk 10 by screws 18b 32b 35h.

The operation of the apparatus is as follows: When the receiver is placed between the clips 14 and 15 ofthe transmitter, as shown in Figs. 1 and 2, the spring 17 is pressed away from the edge of the diaphragm 12, so that the line-wire, which is attached to the terminal 18, is disconnected from the transmitterdiaphragm. At the same time, however, the line-wire is connected through the clip 15, the ring 9, and tongue 19 tothe movable part of the key 23, the strip 22, the binding-screw 21, the wire 29, the screw 35 on the transmitter, and bell 34 to earth. Consequently if aringing-current be sent along the line from the other end of the circuit the bell 34 will be rung. The battery 31 is in this position disconnected from the circuit by reason of the fact that the movable member 23 is not touching the strip 26 and the spring-contact 17 is disconnected from the transmincr-diaphragm 12. If now the press-button`5 be pushed in, the movable member 23 is caused to make contact with the strip 26, and thus joins the battery in circuit between the line and earth, which sends a ringing-current to the line and causes the bell at a similar station at the other end ofthe line to ring.

It' the receiver is removed from the transmitter, the spring 17 will be permitted to make contact with the diaphragm 12, and consequently the battery 31 will be joined in circuit with the receiver-coils 27, the transmitter, and the line. The bell 34 will be'disconnected from the line, since the ring 9 of the receiver no longer makes contact with the clip 15.

In Figs. 13, 14, and 15 a modified form of receiver is shown, in which the key for making and breaking the talking-circuit is mounted on the receiver-magnet 20, and in this case the spring-contact 17 in the transmitter is dispensed with and the transmitter-diaphragm permanently connected with the screw 18, which is insulated from the clip 15. rlhe terminal 24, which is secured to the receivermagnet, is in permanent connection with the movable portion 36 of the talking-key, the other portion 37 of which is permanently counected to the terminal 25, strip 26 being removed. An additional orifice 38 is provided ICO IOS

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in the side of the receiver-casing, through which projects a button 39, of any suitable description, adapted to engage with the movable member 36.

The connections of the instrument are shown in Fig. 16, from which it will be seen that the battery 31 is connected between the screw 1S on the transmitter to the transmitter-diaphragm 12 and earth. Screw 13 is furthermore connected through wire 40, which forms part of the flexible conductor 41, to terminal 2l, the strip 22 attached to which being normally out of contact with the movable member 23 of the ringing-key. The screw 24 is connected through the wire 42, forming part of the flexible conductor 4l, to the screw 35 on the transmitter, which is also connected to line. The screw 33 on the transmitter is connected through conductor 26 to one end of the receiver-coil 27, as before. The bell 34 is connected between the clip 14 and the earth, as shown.

In the form of receiver shown in Figs. 13, 14, and 15 the tongue 19 is dispensed with. The connection between the ring 9 and the screw 34 is insured in the following way: The push-piece 39 is made of metal and rubs against the edge of the ring 9. Said pushpiece is also in metallic contact with the movable member 36 of the talking-circuit key, which isin direct connection with the screw 24.

The operation ofthe apparatus is as follows: When the receiver is placed between the clips on the transmitter, the screw 34 will be connected to line through the clip 14, the ring 9 of the receiver, push-piece 39, movable member 36, terminal 24, wire 42, Land screw 35. Consequently a ringing-current sent from the other end of the line will ring the bell. It the press-button 5 be pushed in, the key 23 is caused to make contact with the strip 22 and connects the battery 31 through wire 40, terminal 21, terminal 24, andwire 42 to line, sending a ringing-current into the line, which rings the bell at the other end. The bell 34 at the home end of the line will also be rung, because clip 14 is connected through the ring 9 of the receiver to screw 24, which is, as before stated, connected temporarily with the battery 31. If now the receiver be removed from the transmitter, the bell 34 Will be cut out of circuit, and if the push-button 5 is released and the push-button 39 pressed in the movable contact will be caused to make connection with the contact 37, and thereby connect the battery 31 through the transmitterdiaphragm, the screw 33, the wire 28, and the receiver-coils 27 to the terminal 24, and thence through the wire 42 to line. When the pushbutton 39 is released, the talking-circuit is broken.

By using the second arrangement shown in thedrawings, in which' the key for the talkingcircuit is mounted on the receiver, the operator kcan at any time prevent his speech being overheard at the other end of the line, which is not the same as the arrangement first described. Furthermore, this construction also prevents any possibility of the battery being connected to line,and thereby wasting' current when the apparatus is not in use.

1. In a telephonic installation the combination of a fixed transmitter having projecting metallic horns or clips connected to the line, a receiver provided with a metallic rim adapted to engage with said horns or clips, and a ringing-key located in the receiver one terminal of which key is permanently connected to the rim of said receiver the other terminal being connected through a flexible lead to the transmitter, substantially as described.

2. The combination of a fixed transmitter having projecting horns or clips, a spring se-` cured to said transmitterand in electrical connection with the line and adapted normally to make contact with the edge of the transmitter-diaphragm, and a receiver the rim of which is adapted to be engaged between said clips and when so engaged to press said sprin g away from the edge of the diaphragm, substanti-ally as and for the purpose specified.

3. In a telephonie receiver, the com bination of a circular magnet, a bell-terminal, a ringing-key, a line-terminal, a battery-terminal, and receiver-coils, all secured to said circular magnet, substantially as and for the purpose specified.

4. In a telephone-receiver, the combination of the casing, a push-button projected through said casing, a ringing-key operated by said push-button, a circular magnet, said ringingkey, the battery-terminal, the line-terminal and receiver-coils being carried by said cir-v cular magnet.

5. In a telephone-receiver, the combination of a circular magnet, a ringing-key for closing the bell-circuit secured to said magnet, one of the terminals of same beinginsnlated therefrom, receiver-coils secured to said magnet, and a key for the talking-circuit carried by said magnet one terminal being connected Vwith one terminal of the receiver-coils, and

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push-putten passing through asecond orice phragm, substantiallyas and 4for the purpose l to said box, substantially as and for the pur :o specified. pose set forth.

8. In a telephone-transmitter, the oomb- In Witness whereof I have hereunto Set my nation of an insulating-box containing Ihe hand in presence of two witnesses.

microphone granules and diaphragm, a pair 1 of horns or clips secured to said box adapted l GEORGE LEP ANDERS to support and make Contact with the tele- Witnesses: phonio-receiver case, and suitable terminals FREDERICK WILLIAM LE TALLj for line, bell and batterywires, also attached LEONARD EDWARD I-IAYNESa 

